Dry-kiln.



H. HUNTER.

DRY KILN. APPLICAIION FILED FB.x2,1911.

H. HUNTER.

DRY KILN.

APPLICATION FILED FEB. l2. |911.

Patented Ja11.22,1918.

2 SHEETS-SHEET 2\ 1 tel", and involves HARRY HUNTER, F INDIANAPOLIS,INDIANA, ASSEGNQR '1110v THE HUNTER DRY COMPANY, 0F INDIANAPOLIS',INDANA, A CURPURATIDN OF BEY-KIEM.

memes.

Spcification-of Letters Patent.

Patented Jam 22, 1918.

Itoplicattoriv med- February/'12; 191.7. Serial No: 1481124.

To oZZ- whom; t Concern:

Beit known that I,` HARRY HUN-Ten, a ottimo: ot" the 11i-ted States,residing at Indifanzqjolief in the county of 4lvlerion' and lita-ter ot'Indiana'I here invente-d a new and useful.Drydiiln. ot', which theJfollowing is a' specification.

lhe objet-t ot' vmy invention is to prof doce e dry kiln for producingdrying at a rapid rated. without injury tothe articles being dried.ther" devel-opment and iniprov'enient of what. is shown infm'y PatentNo. 1,067,921, but omits sorneoflthe features shown in the latce-rtainnew features by Whi rtho rafte ot' drying ina-y be materially hiere:greater flexibility of control obtzt-ined. accessi? Thel:recoin[.nrlfiy'ing drawings illustrate my invention'. Figure 1 is a`vertical longitud-inal seotion through a dry` kiln ronstructed inaccordance with my' invention, with sonriev parte broken away, und withsome ot' the doors closed and some open; Fig. is a set'tio'n on the line;-i ot' Fig. l; and Fig. Il is a fragmentary detail oi' the dampercontrol-line4 the air inlets on eerh side.

It suhstnntially closed room or compartment is tf'n'roed hy end wellsand d, side walls 7 and 8. e Ceiling 9, and a door fi@ all, of whichare' preferably 'properly heet in- 'snla'tod` at least one of the ondmills heilig provided 'with a door 1l.

Un auch side oi? this compartment. and parallel to the side wall' 7 or 5is a serios of doors 12, which are hinged at their upper edges to a,beam l?, extending down from the ceiling-r 9 so that they can he swung;either -to vertical position, :is-shown in full lines in Fig. or 4tohorizontal position just below the ceiling 5.), as indicated in, dottedlines at the left ot' Fig. 2 und as shown at the right hond end ofFig. 1. lil/hen the doors 12 ere swung to horizontal position their freeends are supported from the ceiling 9 by suitable hooks 1.1. Each set.of doors 12, when low ered,A form with the associated beam 13 apartition parallel to but spaced Jfrom the adjacentside well 7 or 8,which artiton extends from the ceiling;f f) down tairly'elose to thefloor 10. Directly below the lower edges of each series of doors 12 butspaced; therefrom is an open water vessel 15. extending the full lengthof the compartment and My present invention is a for the parts renderedmore easily supplied in anyv suitable way with Water' yvhich is heatedby steam pipes' 1G immersed 1n tlien'ziter in' such resseh'the watervessel 15 helng supported on a beam 17 resting on the ioor 10.

letweon each series ot doors 12. and the adJat'ent side wall 7 or S is asecond series of' doors 1S,ivhiGh ar@ hinged at their lower edges to abeam 1t) extending np from the Hoor slightlyv beyond the upper edge ofthe waiter vessel so that they can either be situ-ng to verticalposition as shown in full lines in Fig, Q, or swung downward toapproxima-tely horizontal position overlying the water vessel 15; Thenormal upper edges of the doors 18 are provided with block-s 2U whichserve to support the outer edges. of these doors when they are loweredand to space the doors 1S from-the doors 12 when both are in verticalposition. Corresponding blocks 20 may be provided on the lower ends ofthe doors 1Q. The doors 1S, when raised, forni with the beam 1i) apartition l'mrallel to but spaced t'roxn hotly the adjo- 'cent side wailT or 8 and the partition formed by the doors i2, which partition formedby the doors .5S projects from the floor up fairly (-lose to theceiling;` 9.

Illfhe doors 18 are spaced from loo'th the adjacent side wall or andtroni. the doors ont are considerably closer to the doors 12 than tothesido neil. ln the space iletween the doors .18 and the side walls 7or 8 is lorated a group of steam pipes 21, which. are supplied withsteam in any suitable manner. Air inlet pipes 2:2 project in. throughthe lower edge ot' @ech side wall 7 and 8 and are turned upward et theirinner ends so es to discharge upwardly on to the steam pipes 21. Theinlet ends ot these air inlctpipes 22 are pro-vided with dempers 23,which maybe operated in the usual manner of dempers as is clear troniFig. 3, to vary or shut oli' the. supply ot air through such pipes, thetwo dann/)ers 23 for the two sets of air inlet pipes on the two sides ofthe comf partment being separately controlled. The upper end of thespace between the doors 1S and the side walls 7 or. .8 connected overthe upper edges of the doors 18 with the space between such doors andthe` doors 12, and preferably a curved battle surface 24h25 providedover the ripper edges of the doors 18 at the top ot lthe space betweenthe side wells I or 8 and the doors 12 for turn-l ingthernsoendingmirrom .around the steam pipes '2%2'1 domineert] into thespare between :the doors .lrianfl-the doors `v112.

Air :outlet Ioipes 25 'projeet through the beams I7 un' '119 on `euchside vfrom the lon'erpart of'the central drying chambers, nml thesepipes turn upwurd und are eurred-pus'tthe nupipes 2l 'into .n ldrinn:Qejleeated on euch y'eide 'in the up'ier part to of the 'since betweenvthe Asitlefwnli for 8 1:und the oorsll. 'Freni euch of vthese two drums126, :a pipe-27 extends uviwurd either *tothe ntmosphere-or'to the in etkside of a suituhlyrtirirenfblower QSL-'counnon 'to the l5 ipes'v or`blu ruches''to both us shown, the ilonfer vtiliseliurging' u't Yanyconvenient .point to'flhe :atmosphere A butterfly vulve 'eontrolsftlrefconneetion from euch drum 26 `c'ireet Ato tlieeftinosphere, und usimilar *vulve S B0 fthe connection from euch drum to the,

" is duplicated at both sides of the eonipnrhu lhlou'er 12S.

Tf -elesireh "there "muy also be provided e vulves 29 or 30 ure all oven.

return 'pipes Sil-which ure interspersed with the"ourlet pipes und likethe lutter 'pro- 1% eetthrough the heunfis 17 und 19 from 'thelower-peri of 'the 'central drying vchamber -:unilThurn upward into 'thespaces between Ythe respective siole -ufells 7 und 4'8 und the doors-12.The pipes 31, however, discharge v1upwelrfl'intofsu'c'h spree onto thesteam pipes yQ1, 'uscio `the nir inlet .pipes The inlet ends vof theV,pipes ,S1 are proiided with dempers 3Q, fsinnier 'to 'ihe dempers 23,'the dempers '2&2 'for the 'tiro sets oi? return pi )es 3i-5 *31 'onftletwo fsilesfo'f the compartment einig feontrolle seperately from eachother fanti from the tempore L23.

.In-operation, the hem of euch set of steam pipes l enuses theuirftorise in the feeding 40 spafeehetweenthetlo'ors 18 andthe srle well7 MUS,4 rawing 'n air from `the utmosphere .through 'ilrefnirj t'pipes22 if the dempers y.93.seheripennuitroniftilremein llrying chorus`heritino-ughilseinstruir; .pipes 3i if 'the dem ersnre'opeu. 'Thisfmrheated or re- L pesses `ups-urti over the steam Vel 4when fit renehesthe'top of 'the eontuiningfsueh nipes 'russes ieper edges cuiv "the oor l-iind 'tl wirough lthe "feefling spese he iQ-nnufthe eloersli. 'Whenottoni of 'thi'slutter specie, it p'a eloweretlges of the'do'ors 12,until te 'e trol friug e'ouipurtiuent hetween tico oi? oorfs {3112anlwhieh e pieuse henrtieles'to'he drie' "the t hen et?! fuir epessesi'unifier fthe lower of itheioorslyiitlt 1 heiilteilweter in 'resse-Hom@heroines uinilliie'dtherehy "i@towfileiiniteextent,'epeurling-upon'thetem #this sir.`-` uteriiiligvu"lsnithervingreni enuiiles it' to ltulee fp nee more "quielzlr vunil ut1% Je higher then-it 'the air *were not humidiiied. The air circulatesthrough the drying ohu1nber, to produce. the desired drying., and thenpasses out ut beth sides through 'the return pipes 31, Vfor rehentngvasset o'rtlud or through 'the nir outlet pipes im 25, which curry it tothe drums :26, whence it passes by the pipes 2? to the utinosphere,through the vblower '2S or not. uocordm' Yto the setting of the vulves.2l und 30. he hlower 2S muy be used to produoe n forced '7e Circulationwhen that is desired; though for most dryin' operations the 'oireuhrtionvis rapid 'enougi without operating such blower, for n naturelcirou'lntion occurs by reason of the heating effect of the steam pipes21 not only on the incoming uir from the inlet 'pipes 22 und the returnnir from the pipes '31 but also ou the outgoing nir in the pipes 26.

The circulation which has been described 35 ment, if the dempers 23 and32 und the. However, the circulation muy be modi ed hy closing eitherdamper 23, leither or both dempers 3:2, eiher so or both valves 29,either or both vulves 30,

or some combi-nation of these. Thus if one damper lQ3 and both dempers32 ure eloser while the other damper 23 nud lboth wives 29 or 30 remainopen, the air enters utone e5 side, circulates throi'igh the dry-ingchamber, und leaves through the plipes 25 ut both sitles` passing to theutmosp ere either. direct or throu h thehlower Q8 according to whether eit is t `e vulves Q9 or the rulves '30 Iwhich are onen; there is norehentng et the 'nir in this arrangement. Corresponlinrgly, if one valve29, both vulves 30, ami hoih Kleinpers B2 are closeri` while the othervulve Q9 and hoth dempers 2B remain opeur the oir enters at one side,circulates through the drying chamber, and leaves through the pipes v25at one eine only, passing to Ythe etmosphere without. going to theblower 28; there-1s also no rekening of the nir in vthis 'nrren @mentiIn the arrangement inst de scribe ,e forced Veireulntion muy heobtuin'eii hy fthe'hiewer 28 by closing the open vulve@ enti 'openingthe velue 30 in the seme pipe 'Qh It one rlemper 23, ho'th dempers 3%one vulve 29` auclhoth vulves BU ure elosei, while thel other demper Q3unil the yother valve 29 renmin's open, ell the nir enters ut one sidemi leaves et one eine, the side of entrrrnee und the side of leavingheling either thesnme side or opposite sides mourning te which of 'thevulves Q3 und whieh of "the 'vulves 29 Vnre -opeiu Here `also is #norelientingsn ns 'before e ftoreed circulation instead of n natureleiieuluiion :my 'he ohtuined yheitere oiosiug zche vulve 29 unil openingthe eorresonciiug vulve et). ly opening one 'er hot vileuniers im someet the nir drawn r'from the neutral ehiuni-ier is Y esrriecl vugtuu overthe 'pipes im eee re no Mil l 'ab 'bach into the drying chamber.

League heated and 'then carried `hack to the drying chamber. This may bedone on either or both sides, with fresh air -trom the atmosphere beingdrawn in on the same side or 'sides or not. Fori-nettime.. by openingthe damper Q3 on one sideonl and the damper 82ml the other Side only,iresh air is drawn in on the first Side, and a'ir from the central dring chamber' is drawn out at the other si e near the bottom andretreated and sent Other modiications of these arrangements may be usedby di'ie'rent arrangements of the valves and dempers.

'By using -pipee` 2l for vheating air entering -at hot-h nides..it ispossible, to obtain a velv cone'idcrably higher dry-ing tem perat u rewhich may be Still `further vaised by reheat'in'gt'he air drawn from thebottom .of

the dryin chamber through the return pipes 31. t is 'possible to usethis high dry lng temperature, by reason of the humiditying of 't 1eair'by the. water in the vessels 17': and eert-ain eects can be obtainedby this 'higher temperature which are not possible at Ilowertemperatures. The damper-s QF and 32 and the valves 29 and 30 provide anabsolute control of the amount and direction of the circulation. The4hinged mounting ot tl'hedoore 1Q and 1.8 rendersthe steam pipes-Qlfaoceseiblta for cleaning and repairing. In

-eome instances. one set of air inlet. pipes with a niet. of steamcoils, or one set of air o'itlet pipes, or one or both` sets of returnpipes. or 'either the-.direct discharge. to the atmosphereor thedischarge through the 'blower torforced circulation, or several ot' Ythese.. may be omitted: but in order to make oeeible 'a higher dryintemperature l p re.- ler to have bot-h sets o air inlet pipes with theirsteam ipee and 'Water pans even thon -h other eatnres be mnitted` I caim as mit invention:

l. Adry kin. consisting of a main or outer compartment havin-g a.`ceiling and Weile. a partition project-ing downward'i'ntoSaldlepmpn'rtnient near vone. wall, a. second partition proj;eatinguupward between 4said rst. '.-aartitalon and fthe adiaeen-t wall. sai-d ga rti'tioin being respeotively vs aced from the o'or -a'nd :the 'ceilingof sait compart'met'it and the two partitions beinp; spaced from eachother and from said wail. heating means located in the spa-ee between.said eee and partit-ion and the adjacent wall. said "space beingproridetiwi'th an air inlet open Vat the l )ottoni and said compartment.be 'ing provi-tied with an air outlet opening. each saliti vpar't'i'ttmsconsisting oiV a plurality of doors, the 4door-e oi? the partitionsnearer 'the adjacent wall peine hinged at the bot torn and those .of@the other partit-ion being,t 'hinged at. the top.

i2. A dry kiln. consisting of a main or outer compartment 'having aceiling and walls, a partition projecting downward into said compartmentnear one wall, a second partition prolectlng upward between said firstpartition and the adjacent wall, said il. A dry kiln. consisting of amain or outer eomlmrtment having a ceiling and walls. a partitionprojecting downward into said commitment near one. wall, a .secondpartition projeetinttr upward between said first partition and theadjacent wall. said partitions beingl respectively epaced from thefloorand the veiling ot' said eonipart nient and the two partitionsbeing Lspaced fwn-nraeh other and from `Said wall. heating means locatedin the spat-e between said second partition and the adjacent wall` saidspare beingl provided with an air inlet opening at the bottom and saidcolnlmrtluent beeach of said partitionV being' mounted on hinges. the.hinges for the partitionA nearer the adjacent wall being nearer the.bottom of auch partition and those for the other partition being nearthe top of auch parttion.

el. A dr)v kiln. -onsistingof a main or out-'er compartment having' aceiling and walls. a partition projecting downward into saideonipartinent near one wall. a seoond partition projecting.;ir upwardbetween said `rst partition. and the adjarent wall` said partitionsbeing respectively spaced from the. floor and theeeling of. saidrompartment and the two partitions being: spared from ing' provided withan air outlet o]:)ening.f

each other and from said wall. heating means located in the spa-eebetween said eee;- ondi .partition and the adjacent wail. said npaee.beine` provided with an air inlet opening-at thel ottoni and .saidcompartment bei'ng provided with an air outlet opening.'

ret partition and the adjacent wall. said partitions l'ieingrespeetiveli,7 spaced from the floor and the ceiling` ofsnid rompartmentand the two partitions` being spaced from eaeh other und from said wall.heatingmeans located in the spare l-ietween .said .second pa r -titionand the adjacent wall, said space be ing provided with an air inletopening at Vthe bottom and said compartment being provided with an airoutlet opening.

6. A dry kiln, consisting' of a main or outer compartment having alceiling and walls, a partition projecting downward into said compartmentnear one wall, a (second partition projecting upward between said firstpartition and the adjacent wall, said partitions being respectivelyspaced from the fioor and the ceiling ot' said compartment and the twopartitions being spaced from each other and from said wall, heatingmeans located in the. space between said sec ond partition and theadjacent Vall, said space being provided with an air inlet open ing atthe bottom and said compartment being provided with an air outletopening, and an open water vessel located under the lower edge of saidfirst partition.

7. A dry kiln. consisting ot' a main or outer con'ipartnlent having aceiling and walls. a partition projecting downward into said compartmentnear one wall, a second partition projecting upward between said firstpartition and the adjacent wall, said partitions being respectivelj7spaced from the Hoor and the ceiling of said compartment and the twopartitions being spaced from each other and from said wall, heatingmeans located in the space between said second partition and theadjacent wall, said space being provided with an air inlet opening at.the bottom. and an air outlet pipe extending from the lower part of saidcompartmentthrough said second partition and up through the space inwhich said heating means is located.

8. A dr)7 kiln, consisting o'f a main or outer compartment having aceiling and walls, a partition projecting downward into said compartmentnear one wall, a second partition projecting upward between said firstpartition and the adjacent wall, said partitions being respectivelj7spaced from tbe,floor and the ceiling of said coinparts ment and the twopartitionsA being spaced from each other and from said wall, heatingmeans located in the space between said second partition andthe adjacentwall` said space being provided with an air inlet open ing at thebottom` an open Water vessel located under the lower edge of'said firstpartition, and an air outlet pipe extending from the lower part of saidcompartment beneath said water vessel and through said second partitionand up through the space in which said heating means is mounted.

9i A dry kiln` consisting of a main or outer compartment having aceiling and walls, a partition projecting downward into said compartmentnear one wall` a second partition projecting upward between said firstpartition and the adjacent wall, said partitions being respectivelyspaced from the floor and the ceiling of said compart ment and the twopartitions being spaced from each other and from said wall, heatingmeans located in the space between said second partition and theadjacent wall, said space being provided with an air inlet opening at.the bottoni, and an air outlet pipe eX- tending from the lower part ofsaid compartment through said second partition.

l0. A dry kiln, consisting of a main or outer compartment haring aceiling and walls, a partition projecting downward into saidcon'ipartment near one wall.y a second partition projecting upwardbetween said iirst partition and the adjacent wall, said partitionsbeing respectively spaced from the floor and the ceiling ot' saidcompartment and the two partitions being spaced from each other and fromsaid wall, heating means located in the .space between said secondpartition and the adjacent wall, said space being provided with an airinlet open ing at the bottom, an open water vessel located under thelower edge of said first partition. and an air outlet pipe extendingfrom the lower part of said compartment beneath said water vessel andthrough` said second partition.

1l. A drj7 kiln, consisting of a main or outer compartment haring aceiling and walls, a partition projecting downward into saidcon'lpartment near each of two walls, a partition projecting upwardbetween each of said first partitions and the adjacent wall, said firstand second-named partitions being respectivelj7 spaced from thelioor andthe ceiling of said compartment and the two partitions near each wallbeing spaced from each other and from said wall. heatingnieans locatedin the space between each of said seconduiamed j'iartitions and theadjacent wall, each of said spaces being provided with an air inletopening at the bottom and said compartn'ient being provided with an airoutlet opening.

1Q. A dry kiln, consisting of a main or outer compartment having aceiling andA waiis, a partition projecting downward into saidcompartment near each of two walls, a partition projecting upwardbetween each of said first partitions and the adjacent wall, said firstand second-named partitions being respectively spaced from the Hoor andthe ceiling ot said compartment and the two partitions nea-r each wallbeing spaced from each other and from said wall, heating means locatedin the space between each of said second-named partitions and theadjacent wall, each of said spaces being provided with an air inletopening at the bottom and said compartment being' provided with an airoutlet opening, and an open water Vessel located under the lower edge ofeach of said first-named partitions.

13. A dry kiln, consisting of a. main or MLS `:from :the spa-ce on theother side of said second partition. and .said `coinpartaient. .be-

provided `with an' outlet pipes.

A drjfr kiln, eon-sistiner of la main -or oiuter compartment haring aceiling and walls, a partition projecting downward intosaid'compa'rtment near vone Wall, a second partition projecting upwardvbetween said first :partition and the adjacent wall, said 4partitions-.being respectirel)T spaced from :the vitloor and the Sceilint.r of saidcompartment Aand-.the two partitions being spaced from each lother andfrom said 4wall, heating means located-jin the space between saidsecond' partition andthe adjacent wall. said space being provided at thebottoni with air inietopen-iims botli .from the .atmosphere and :fromthe space on the other side of said first partition, and saidconipai-traenty being pro- 'ridcd with '.air outlet pipes, and an openvwater vessel located under the lower edge ot' said'irst partition.

.1127. A 'dry'lrilin consisting .of a main or outer compartment havingya ceiling and Walls,-.a1partitipn projecting downward into rsaidcompartment nead one wall, a second "partition 'projecting upwardbetween said first fp'artition'and the ,adjacent 1ivall, said partitions:beingr .respectively spaced from the l.floor and the ceilingr vof saidcompartmentand the .two j partitions being spaced -fromieach other andfrom said wall. heating means loeatedin the space between said secondvpartitionrand lthe adjacent nia-ll` said space' being rprovided attilie bottoni with air inlet openings :both `from 'the atmosphere. and.from `the space on 'the other side of said second partition, :and `an.air outlet pi-pe extending from 'the' *lower part of saidcorupartment'tllrougli said second partition and up through the :spacevin .which said hea-ting :means is located. l'

28. A dry k'iln, `c-'cmsisting of azmain or router compartiment having aceiling and Walls, afgpartitionprojecting downward into said compartment:near fone Wall, a. second :partition 'projecting mpward between saidtiret jpartition and the :adjacent wall, :said partitions @being-rrespectively spaced from 'thei'illooraand v'.tlie ceiling .of saidcompartiment and the two .partitions being spaced from eachother andvtrom said Wall, heat-ing `"mean-s located lin 'fthe space between saidsecond partition.' and at'he adjacent Wall. .said

espace beilgproliled Lat vtlie"iaottoml with air inlet openingslaotii-tromltlieatmosphere and i-rom "the spiace @on the-other slide o-f saidsecment Enough said lpartition.

' .Q vdif-gy.lil'n., `consistir:14er"uit main or enter l1com partmsei'itdrawing ra fceiilfiuaf and walls, :a partition-projecten@ ilrowInward'into said compartment 'near each of vtwo Willis, .a partition p rojecting .upward 'between each of .sa id tiret partitions. and the adiace-nt mali., said first and second-named partitions .being respectivelyspaced 'from Til-1e .and the ceiling Aot sai-d compartment and the twopartitions near each wall being spaced from each other `and from saidWall, heating means located inthe .space loot-Ween eaeli of saidsecondmamed partitions andthe adjacent Wallfeach of said spaces-beingprovide-d with an air inlet open-ingV Itrom the atmosphere and an airreturn opening from fthe central space beyond the.associated-partitions, and .saidcompartment being `proded i with an airoutlet opening.

30.` A dry lri'ln, consisting ot' .a .main ror outer compartment haringa ceiling and Walls, a partition projecting downward into said.compartment near each of two walls` a partition projecting upwardbetween each oi' said Afirst partitions and the adjacent nalL said firstand secondnamed partition-s being respectively spaced from the floor andthe ceiling of said compartment and the two partitions near each wall4'being .spaced from each other and from said Wall, heating meanslocated in the. space between eacli ot :said .second-named partitionsand the adjacent Wall, one of .sai-d spaces being pro- *vided -with 'anair inlet opening 'from the .atmosphere and 'the other with an airretiirn opening from the' central space beyond .the associatedpartitions, .and said `eo inpaatment being' provided with an air outletopening.

3l. A dry kiln, consisting .of :a main or I outer compartment har-ing .aceiling and Wall-s, a partition projecting downward into saidcompartment near each of tw@ walls, a partition projecting upward4betweeneach of said first partitions and-the adjacent wall,

said .first andsecondna-ined partitions being respectively spaced from lthe floor and the ceiling yol said compartment .and the two partltionsnear each Wall -being spaced troni each :other and from 'said avail,heating .means located in lthe space yloci-,Ween 4each of lsaid secon-djacent We @named "partitions :and the adfeacli -D said spa-ces beingprolvided with :ai-r .inlet opening from the atmosphere vand an vairreturn opening from 'the central space beyond 'tile associatedpartitions, and Asaid .compartment bei-ng ro# "vided with an airo'utletopening, and Vai ves controlling :the vair low through the several opennI' A kiln, uc msist`m,1g; of .a main or .outer compartment haring a'ceiiing and walls, la 'partition projecting downward into saidcompartiment near each off two Walls, a partition .projecting upward-zbetween each of -sa-id .first partitions :and the :adjacent wail,

said .and .second-.named partitions being respectively spaced from theoor and the ceiling of vsind compartment :and the two partitions neareach wall being spaced from each other and `from said wall,l heatingmeans located 1n the s ace between each of said second-named partitionsand the ad` jacent wall, one of said spaces being prom vided with an airinlet opening from the atmosphere 'and the other` with an air return.opening from the central' space beyond the associated partitions,and anair outlet pipe extending under a second-named partition and up throughthe space between that partition and the adjacent wall.

33. A dry kiln, consisting of a main or outer compartment having aceiling and walls, a partition projecting downward into said compartmentnear each of two walls, a. partition projecting upward beyond each ofsaid first partitions and the adjacent wall, said first and second-namedpartitions being respectively spaced from the floor and the ceiling ofsaid compartment and the two partitions near each wall being spaced fromeach other and from said wall, heating means located in the spacebetween each-ofi said second-named .partitions and the adjacent wall,each'of said spaces being provided with an air inlet opening from the atmosphere and an air return opening from' the central space beyond theassociated par-V titions and an outlet pipe extending under asecondnamed partition and up through the space between that partitionand. the adjacent Wall.

34. A dry kiln having a ceiling, walls, and intermediate partitions,forming a main drying chamber and two feeding spaces, said two feedingspaces being on opposite sides oi" one of the partitions and beingintercon-y nected at their upper ends and one of said feeding spacesbeing between the other feed Lemme ing `space and* the main `obeyinglchamber* heating means in one of said tee @Eng spaces.,

the feeding space in which seid "heating" means is located, beinorprovidednear its lower end with an air n1 et openingtrom the atmosphereand a return air opening from.

the main drying space and the lower end, of the other feeding spacebeing connected to said main dryingl chamber, humidity-ing means in theconnection between said last named feeding space and the main dryingchamber, and an air outlet pipe leading fromv the lower part of Saidmain drying;`

chamber upward through the feeding space containing the heating means.

35. A dry kiln hayinga ceiling, walls, and intermedlate partitions,forming a main drying chamber and two feedingv spaces, said.

pipe leading from the. lowerl part. of said,l

main drying chamber upward through the feedingspace containin theheating means.

In witness whereof, have hereunto set` my hand at Indianapolis, Indiana,this ninth day of' February, A. D. one thousandfnine hundred andseventeen.

HARRY HUNTER,

Eagle: of this patent may he obtaine, for, ive centsP each, byaddressing the. Commissioner of. Intente,

Washingtem n. 0;

